I have around 30 or so kits that I've accumulated over the years, as most get older I just turn them into trainer-only kits. That said, I think the worst bibs that I've acquired would have to be the nashbar ones I bought when I first started riding, they were only $20, so I wasn't expecting much. My other least favorite pair would be from Champion Systems, which were even their higher quality variety.

Favorites would be from Rapha, Black Sheep, and Casp.

And the best budget friendly, yet comfortable and durable, would be from Heavy Pedal. I have kits from them that still look great after 2-3 years of wear, and they cost me less than $150 for the entire kit.